| 摘要 |
PROBLEM TO BE SOLVED: To provide a cold insulation tool capable of easily performing a visual acknowledgement of whether or not a cooled state is kept at an object state.SOLUTION: A cold insulation tool comprises a composition for cold insulation including water, a deposited component, a non-deposited component and a pH indicator. The deposited component is deposited when the composition for cold insulation is frozen and does not correspond to the pH indicator. The non-deposited component is not deposited when the composition for cold insulation is frozen and does not correspond to the pH indicator. Color of the composition for cold insulation changes in response to variation of generated color of the pH indicator or the presence or absence thereof. |
